diff options
Diffstat (limited to 'git.c')
| -rw-r--r-- | git.c | 398 |
1 files changed, 220 insertions, 178 deletions
@@ -2,33 +2,55 @@ #include "exec_cmd.h" #include "cache.h" #include "quote.h" +#include "run-command.h" const char git_usage_string[] = - "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]"; + "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n" + " [-p|--paginate|--no-pager] [--no-replace-objects]\n" + " [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n" + " [--help] COMMAND [ARGS]"; -static void prepend_to_path(const char *dir, int len) -{ - const char *old_path = getenv("PATH"); - char *path; - int path_len = len; - - if (!old_path) - old_path = "/usr/local/bin:/usr/bin:/bin"; - - path_len = len + strlen(old_path) + 1; +const char git_more_info_string[] = + "See 'git help COMMAND' for more information on a specific command."; - path = xmalloc(path_len + 1); +static int use_pager = -1; +struct pager_config { + const char *cmd; + int val; +}; - memcpy(path, dir, len); - path[len] = ':'; - memcpy(path + len + 1, old_path, path_len - len); +static int pager_command_config(const char *var, const char *value, void *data) +{ + struct pager_config *c = data; + if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd)) + c->val = git_config_bool(var, value); + return 0; +} - setenv("PATH", path, 1); +/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ +int check_pager_config(const char *cmd) +{ + struct pager_config c; + c.cmd = cmd; + c.val = -1; + git_config(pager_command_config, &c); + return c.val; +} - free(path); +static void commit_pager_choice(void) { + switch (use_pager) { + case 0: + setenv("GIT_PAGER", "cat", 1); + break; + case 1: + setup_pager(); + break; + default: + break; + } } -static int handle_options(const char*** argv, int* argc, int* envchanged) +static int handle_options(const char ***argv, int *argc, int *envchanged) { int handled = 0; @@ -51,13 +73,25 @@ static int handle_options(const char*** argv, int* argc, int* envchanged) if (!prefixcmp(cmd, "--exec-path")) { cmd += 11; if (*cmd == '=') - git_set_exec_path(cmd + 1); + git_set_argv_exec_path(cmd + 1); else { puts(git_exec_path()); exit(0); } + } else if (!strcmp(cmd, "--html-path")) { + puts(system_path(GIT_HTML_PATH)); + exit(0); } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { - setup_pager(); + use_pager = 1; + } else if (!strcmp(cmd, "--no-pager")) { + use_pager = 0; + if (envchanged) + *envchanged = 1; + } else if (!strcmp(cmd, "--no-replace-objects")) { + read_replace_refs = 0; + setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1); + if (envchanged) + *envchanged = 1; } else if (!strcmp(cmd, "--git-dir")) { if (*argc < 2) { fprintf(stderr, "No directory given for --git-dir.\n" ); @@ -89,7 +123,8 @@ static int handle_options(const char*** argv, int* argc, int* envchanged) *envchanged = 1; } else if (!strcmp(cmd, "--bare")) { static char git_dir[PATH_MAX+1]; - setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 1); + is_bare_repository_cfg = 1; + setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0); if (envchanged) *envchanged = 1; } else { @@ -104,97 +139,30 @@ static int handle_options(const char*** argv, int* argc, int* envchanged) return handled; } -static const char *alias_command; -static char *alias_string; - -static int git_alias_config(const char *var, const char *value) -{ - if (!prefixcmp(var, "alias.") && !strcmp(var + 6, alias_command)) { - alias_string = xstrdup(value); - } - return 0; -} - -static int split_cmdline(char *cmdline, const char ***argv) -{ - int src, dst, count = 0, size = 16; - char quoted = 0; - - *argv = xmalloc(sizeof(char*) * size); - - /* split alias_string */ - (*argv)[count++] = cmdline; - for (src = dst = 0; cmdline[src];) { - char c = cmdline[src]; - if (!quoted && isspace(c)) { - cmdline[dst++] = 0; - while (cmdline[++src] - && isspace(cmdline[src])) - ; /* skip */ - if (count >= size) { - size += 16; - *argv = xrealloc(*argv, sizeof(char*) * size); - } - (*argv)[count++] = cmdline + dst; - } else if(!quoted && (c == '\'' || c == '"')) { - quoted = c; - src++; - } else if (c == quoted) { - quoted = 0; - src++; - } else { - if (c == '\\' && quoted != '\'') { - src++; - c = cmdline[src]; - if (!c) { - free(*argv); - *argv = NULL; - return error("cmdline ends with \\"); - } - } - cmdline[dst++] = c; - src++; - } - } - - cmdline[dst] = 0; - - if (quoted) { - free(*argv); - *argv = NULL; - return error("unclosed quote"); - } - - return count; -} - static int handle_alias(int *argcp, const char ***argv) { - int nongit = 0, envchanged = 0, ret = 0, saved_errno = errno; + int envchanged = 0, ret = 0, saved_errno = errno; const char *subdir; int count, option_count; - const char** new_argv; + const char **new_argv; + const char *alias_command; + char *alias_string; + int unused_nongit; - subdir = setup_git_directory_gently(&nongit); + subdir = setup_git_directory_gently(&unused_nongit); alias_command = (*argv)[0]; - git_config(git_alias_config); + alias_string = alias_lookup(alias_command); if (alias_string) { if (alias_string[0] == '!') { if (*argcp > 1) { - int i, sz = PATH_MAX; - char *s = xmalloc(sz), *new_alias = s; + struct strbuf buf; - add_to_string(&s, &sz, alias_string, 0); + strbuf_init(&buf, PATH_MAX); + strbuf_addstr(&buf, alias_string); + sq_quote_argv(&buf, (*argv) + 1, PATH_MAX); free(alias_string); - alias_string = new_alias; - for (i = 1; i < *argcp && - !add_to_string(&s, &sz, " ", 0) && - !add_to_string(&s, &sz, (*argv)[i], 1) - ; i++) - ; /* do nothing */ - if (!sz) - die("Too many or long arguments"); + alias_string = buf.buf; } trace_printf("trace: alias to shell cmd: %s => %s\n", alias_command, alias_string + 1); @@ -202,10 +170,12 @@ static int handle_alias(int *argcp, const char ***argv) if (ret >= 0 && WIFEXITED(ret) && WEXITSTATUS(ret) != 127) exit(WEXITSTATUS(ret)); - die("Failed to run '%s' when expanding alias '%s'\n", + die("Failed to run '%s' when expanding alias '%s'", alias_string + 1, alias_command); } count = split_cmdline(alias_string, &new_argv); + if (count < 0) + die("Bad alias.%s string", alias_command); option_count = handle_options(&new_argv, &count, &envchanged); if (envchanged) die("alias '%s' changes environment variables\n" @@ -221,15 +191,14 @@ static int handle_alias(int *argcp, const char ***argv) if (!strcmp(alias_command, new_argv[0])) die("recursive alias: %s", alias_command); - trace_argv_printf(new_argv, count, + trace_argv_printf(new_argv, "trace: alias expansion: %s =>", alias_command); - new_argv = xrealloc(new_argv, sizeof(char*) * - (count + *argcp + 1)); + new_argv = xrealloc(new_argv, sizeof(char *) * + (count + *argcp)); /* insert after command name */ - memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp); - new_argv[count+*argcp] = NULL; + memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp); *argv = new_argv; *argcp += count - 1; @@ -237,8 +206,8 @@ static int handle_alias(int *argcp, const char ***argv) ret = 1; } - if (subdir) - chdir(subdir); + if (subdir && chdir(subdir)) + die_errno("Cannot change to '%s'", subdir); errno = saved_errno; @@ -261,26 +230,29 @@ struct cmd_struct { int option; }; -static int run_command(struct cmd_struct *p, int argc, const char **argv) +static int run_builtin(struct cmd_struct *p, int argc, const char **argv) { - int status; + int status, help; struct stat st; const char *prefix; prefix = NULL; - if (p->option & RUN_SETUP) - prefix = setup_git_directory(); - if (p->option & USE_PAGER) - setup_pager(); - if (p->option & NEED_WORK_TREE) { - const char *work_tree = get_git_work_tree(); - const char *git_dir = get_git_dir(); - if (!is_absolute_path(git_dir)) - set_git_dir(make_absolute_path(git_dir)); - if (!work_tree || chdir(work_tree)) - die("%s must be run in a work tree", p->cmd); + help = argc == 2 && !strcmp(argv[1], "-h"); + if (!help) { + if (p->option & RUN_SETUP) + prefix = setup_git_directory(); + + if (use_pager == -1 && p->option & RUN_SETUP) + use_pager = check_pager_config(p->cmd); + if (use_pager == -1 && p->option & USE_PAGER) + use_pager = 1; } - trace_argv_printf(argv, argc, "trace: built-in: git"); + commit_pager_choice(); + + if (!help && p->option & NEED_WORK_TREE) + setup_work_tree(); + + trace_argv_printf(argv, "trace: built-in: git"); status = p->fn(argc, argv, prefix); if (status) @@ -295,11 +267,11 @@ static int run_command(struct cmd_struct *p, int argc, const char **argv) /* Check for ENOSPC and EIO errors.. */ if (fflush(stdout)) - die("write failure on standard output: %s", strerror(errno)); + die_errno("write failure on standard output"); if (ferror(stdout)) die("unknown write failure on standard output"); if (fclose(stdout)) - die("close failed on standard output: %s", strerror(errno)); + die_errno("close failed on standard output"); return 0; } @@ -308,27 +280,36 @@ static void handle_internal_command(int argc, const char **argv) const char *cmd = argv[0]; static struct cmd_struct commands[] = { { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE }, + { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE }, { "annotate", cmd_annotate, RUN_SETUP }, { "apply", cmd_apply }, { "archive", cmd_archive }, + { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE }, { "blame", cmd_blame, RUN_SETUP }, { "branch", cmd_branch, RUN_SETUP }, { "bundle", cmd_bundle }, { "cat-file", cmd_cat_file, RUN_SETUP }, - { "checkout-index", cmd_checkout_index, RUN_SETUP }, + { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE }, + { "checkout-index", cmd_checkout_index, + RUN_SETUP | NEED_WORK_TREE}, { "check-ref-format", cmd_check_ref_format }, - { "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE }, + { "check-attr", cmd_check_attr, RUN_SETUP }, { "cherry", cmd_cherry, RUN_SETUP }, { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE }, + { "clone", cmd_clone }, + { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE }, + { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE }, { "commit-tree", cmd_commit_tree, RUN_SETUP }, { "config", cmd_config }, { "count-objects", cmd_count_objects, RUN_SETUP }, { "describe", cmd_describe, RUN_SETUP }, - { "diff", cmd_diff, USE_PAGER }, - { "diff-files", cmd_diff_files }, + { "diff", cmd_diff }, + { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE }, { "diff-index", cmd_diff_index, RUN_SETUP }, { "diff-tree", cmd_diff_tree, RUN_SETUP }, - { "fetch--tool", cmd_fetch__tool, RUN_SETUP }, + { "fast-export", cmd_fast_export, RUN_SETUP }, + { "fetch", cmd_fetch, RUN_SETUP }, + { "fetch-pack", cmd_fetch_pack, RUN_SETUP }, { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, { "format-patch", cmd_format_patch, RUN_SETUP }, @@ -343,36 +324,51 @@ static void handle_internal_command(int argc, const char **argv) { "log", cmd_log, RUN_SETUP | USE_PAGER }, { "ls-files", cmd_ls_files, RUN_SETUP }, { "ls-tree", cmd_ls_tree, RUN_SETUP }, + { "ls-remote", cmd_ls_remote }, { "mailinfo", cmd_mailinfo }, { "mailsplit", cmd_mailsplit }, + { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE }, { "merge-base", cmd_merge_base, RUN_SETUP }, { "merge-file", cmd_merge_file }, + { "merge-ours", cmd_merge_ours, RUN_SETUP }, + { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, + { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE }, + { "mktree", cmd_mktree, RUN_SETUP }, { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE }, { "name-rev", cmd_name_rev, RUN_SETUP }, { "pack-objects", cmd_pack_objects, RUN_SETUP }, + { "peek-remote", cmd_ls_remote }, { "pickaxe", cmd_blame, RUN_SETUP }, { "prune", cmd_prune, RUN_SETUP }, { "prune-packed", cmd_prune_packed, RUN_SETUP }, { "push", cmd_push, RUN_SETUP }, { "read-tree", cmd_read_tree, RUN_SETUP }, + { "receive-pack", cmd_receive_pack }, { "reflog", cmd_reflog, RUN_SETUP }, + { "remote", cmd_remote, RUN_SETUP }, + { "replace", cmd_replace, RUN_SETUP }, { "repo-config", cmd_config }, { "rerere", cmd_rerere, RUN_SETUP }, + { "reset", cmd_reset, RUN_SETUP }, { "rev-list", cmd_rev_list, RUN_SETUP }, - { "rev-parse", cmd_rev_parse, RUN_SETUP }, + { "rev-parse", cmd_rev_parse }, { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE }, - { "rm", cmd_rm, RUN_SETUP | NEED_WORK_TREE }, - { "runstatus", cmd_runstatus, RUN_SETUP | NEED_WORK_TREE }, - { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER }, + { "rm", cmd_rm, RUN_SETUP }, + { "send-pack", cmd_send_pack, RUN_SETUP }, + { "shortlog", cmd_shortlog, USE_PAGER }, { "show-branch", cmd_show_branch, RUN_SETUP }, { "show", cmd_show, RUN_SETUP | USE_PAGER }, + { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE }, { "stripspace", cmd_stripspace }, { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, + { "tag", cmd_tag, RUN_SETUP }, { "tar-tree", cmd_tar_tree }, { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, { "update-index", cmd_update_index, RUN_SETUP }, { "update-ref", cmd_update_ref, RUN_SETUP }, + { "update-server-info", cmd_update_server_info, RUN_SETUP }, { "upload-archive", cmd_upload_archive }, + { "verify-tag", cmd_verify_tag, RUN_SETUP }, { "version", cmd_version }, { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER }, { "write-tree", cmd_write_tree, RUN_SETUP }, @@ -381,6 +377,16 @@ static void handle_internal_command(int argc, const char **argv) { "pack-refs", cmd_pack_refs, RUN_SETUP }, }; int i; + static const char ext[] = STRIP_EXTENSION; + + if (sizeof(ext) > 1) { + i = strlen(argv[0]) - strlen(ext); + if (i > 0 && !strcmp(argv[0] + i, ext)) { + char *argv0 = xstrdup(argv[0]); + argv[0] = cmd = argv0; + argv0[i] = '\0'; + } + } /* Turn "git cmd --help" into "git help cmd" */ if (argc > 1 && !strcmp(argv[1], "--help")) { @@ -392,30 +398,74 @@ static void handle_internal_command(int argc, const char **argv) struct cmd_struct *p = commands+i; if (strcmp(p->cmd, cmd)) continue; - exit(run_command(p, argc, argv)); + exit(run_builtin(p, argc, argv)); } } -int main(int argc, const char **argv) +static void execv_dashed_external(const char **argv) { - const char *cmd = argv[0] ? argv[0] : "git-help"; - char *slash = strrchr(cmd, '/'); - const char *exec_path = NULL; - int done_alias = 0; + struct strbuf cmd = STRBUF_INIT; + const char *tmp; + int status; + + strbuf_addf(&cmd, "git-%s", argv[0]); /* - * Take the basename of argv[0] as the command - * name, and the dirname as the default exec_path - * if it's an absolute path and we don't have - * anything better. + * argv[0] must be the git command, but the argv array + * belongs to the caller, and may be reused in + * subsequent loop iterations. Save argv[0] and + * restore it on error. */ - if (slash) { - *slash++ = 0; - if (*cmd == '/') - exec_path = cmd; - cmd = slash; + tmp = argv[0]; + argv[0] = cmd.buf; + + trace_argv_printf(argv, "trace: exec:"); + + /* + * if we fail because the command is not found, it is + * OK to return. Otherwise, we just pass along the status code. + */ + status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE); + if (status >= 0 || errno != ENOENT) + exit(status); + + argv[0] = tmp; + + strbuf_release(&cmd); +} + +static int run_argv(int *argcp, const char ***argv) +{ + int done_alias = 0; + + while (1) { + /* See if it's an internal command */ + handle_internal_command(*argcp, *argv); + + /* .. then try the external ones */ + execv_dashed_external(*argv); + + /* It could be an alias -- this works around the insanity + * of overriding "git log" with "git show" by having + * alias.log = show + */ + if (done_alias || !handle_alias(argcp, argv)) + break; + done_alias = 1; } + return done_alias; +} + + +int main(int argc, const char **argv) +{ + const char *cmd; + + cmd = git_extract_argv0_path(argv[0]); + if (!cmd) + cmd = "git-help"; + /* * "git-xxxx" is the same as "git xxxx", but we obviously: * @@ -437,52 +487,44 @@ int main(int argc, const char **argv) argv++; argc--; handle_options(&argv, &argc, NULL); + commit_pager_choice(); if (argc > 0) { if (!prefixcmp(argv[0], "--")) argv[0] += 2; } else { - /* Default command: "help" */ - argv[0] = "help"; - argc = 1; + /* The user didn't specify a command; give them help */ + printf("usage: %s\n\n", git_usage_string); + list_common_cmds_help(); + printf("\n%s\n", git_more_info_string); + exit(1); } cmd = argv[0]; /* - * We execute external git command via execv_git_cmd(), - * which looks at "--exec-path" option, GIT_EXEC_PATH - * environment, and $(gitexecdir) in Makefile while built, - * in this order. For scripted commands, we prepend - * the value of the exec_path variable to the PATH. + * We use PATH to find git commands, but we prepend some higher + * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH + * environment, and the $(gitexecdir) from the Makefile at build + * time. */ - if (exec_path) - prepend_to_path(exec_path, strlen(exec_path)); - exec_path = git_exec_path(); - prepend_to_path(exec_path, strlen(exec_path)); + setup_path(); while (1) { - /* See if it's an internal command */ - handle_internal_command(argc, argv); - - /* .. then try the external ones */ - execv_git_cmd(argv); - - /* It could be an alias -- this works around the insanity - * of overriding "git log" with "git show" by having - * alias.log = show - */ - if (done_alias || !handle_alias(&argc, &argv)) + static int done_help = 0; + static int was_alias = 0; + was_alias = run_argv(&argc, &argv); + if (errno != ENOENT) break; - done_alias = 1; - } - - if (errno == ENOENT) { - if (done_alias) { + if (was_alias) { fprintf(stderr, "Expansion of alias '%s' failed; " - "'%s' is not a git-command\n", + "'%s' is not a git command\n", cmd, argv[0]); exit(1); } - help_unknown_cmd(cmd); + if (!done_help) { + cmd = argv[0] = help_unknown_cmd(cmd); + done_help = 1; + } else + break; } fprintf(stderr, "Failed to run command '%s': %s\n", |